The Beast Must Die is a 1974 horror film directed by Paul Annett. The screenplay was written by Michael Winder, based on the short story "There Shall Be No Darkness" by James Blish. The film starred Calvin Lockhart, Peter Cushing, Marlene Clark, Michael Gambon, Charles Gray, Anton Diffring, Ciaran Madden, and Tom Chadbon. It revolves around the search for a werewolf on a far off island by a group of serious minded people out to find it. The viewer is invited to unfold the mystery along with the characters. Near the ending, there's a 30 second break called "The Werewolf Break", where the audience is asked to guess who's the werewolf, based around the events of the movie.